Glass-heating furnace.



T. W. FRBGH, JR. GLASS HEATING FURNAGE.

APPLICATION FILED SEPT. 8, 1905.

952,51 7. Patented Maf. 22, 1910.

2 SHEETS-SHEET 1.

Kw1/WMM ya; fg www T. W. FRECH, JB. GLASSHEATING FURNAGE. ABPLIGATION FILED sEPlxa. 1905.

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eleaiz and e A properlyr 'feeding th tiene Surrounding the furnaces TRIO LAMP COMPANY, OF GL THEODGREVV. FRECH, JR.. OF CLEVELAND, GHID. ASSIGNO EVELAND. OHIO, A CORPOR GLASS-HEATING FURNCE.

To all whom 11 may concern;

Be it` known that I. Tiiiononii lV. Feiten, Jr.. a citizen of the lfnil'ed States. residing at Cleveland. in the county ot' (hiyahogija and State ot Ohio. hare invented a certain new an l=i-isefiil lniproi'enient in Gla VFurnaces. ot' which the following is a t'ull,

Xact description. reference bein had to the :iccoiiipaii \'iiig drawings.

ii the heating of glassw larly articles of siii-li delicate nature and structure as incandescent laiiip bulbs, considerable ditiieiilty hasI been experienced in ein into and removing thein t'roiii annealing' and heating' ovens, and iii securing; an eren treatment ot the various articles while being heated.

ln the course ot removingl the heated w t'roiii the oyen it is desirabl coming in eontaet with ni temperature. since thiI will result in settingr upstraiiis in the ware resulting' in either ininiediate or iiltiinate fracture.

fin additional disadvantage of the structures heretofore used flows from the tact that the doors toi' the feeding and removal oi the work' have been in either the sides or the tops ot the various types ot furnaces. il'liile with 'the feeding' devices hitherto eiiiployed, this ar 'angeinent has been practically a necessity, it has nevertheless been very iinsatis'factory owing to the tact that upon the opening' of these doors. the liotair within the furnaces tiows out with great. rapidity and iS replaced by the cold air fro-in the exterior. The ioss of heat occasioned by this notion is of seine. inoinent when -working with small ovens in which the Volume of contained. air is not large. rThe matter is of eonseqnenoe not merely because of the waste iii fuel but. because of the Waste .of time occupied in again bringing' the oven to the proper temperature; and, inasmuch as the tlispaeenient of the hot air by the cold air rni the outside Varies considerably 'in its Nant, according ..o the temporary condithere is no accurate standard by which to ifegulateitlie length of time for heating each successive charge.

To satisfactorily overcome these dit'eulties, I have devised an eicieiit and simple apparat/as in which the heat is applied in such a manner as to be iiiiiformin its ei'ect upon the entire charge, and have further are e to prevent its aterial ot' lower are. and partieii- Specification of Letters Patent.

Application filed September 8, 1905.

i t i i i i i ss-lleatiiig f provided ineaiis ing' the articles shall not be .subil material liabie to chill or Figure l is an end elev tion. Figi. 2 is ing' oren lookin plan View of the exterior walls o walls are compos material, sach as A of the oven is provid ture and supports `iovided with an o1 eiiiiiO` in its bottom Wall i i :D fitted to and i'eo'ist the wail ii. snialler than th that a space A" spcetively.

have provided. B', BL. and B,

ers are placed ii pipe D. As Wiil this manner is evenly heated Zo interior will prefera Wall of the oven the temperature served.

warennder manner as to al l'eeiprocation of 1 signed to reeeiv iii-ted inte pla closure of the mi toi-ined betw and top walls of said iiiiifiie a oi'eii wall into the space A3.

and are so positione. sides of the Yniurle each burner align 'thereof and proximate to the corners. The

effect; of this disposition of the Haines is to canse a circulation oi'i the hea-tin 0 was aroiiiid and about the. niiitiie as itA si top (if-the oven, from which leads aii'eliit be iinitorni throughout. bly provide at some point'y wi The aboye described means lars `E and suitable traineported on Vthe iii @FFQEQ R TO THE NATIONAL ELEC- l.ATION OF NEW JERSEY.

Patented Mar. 22, i910; serial No. 277,511.

iig all this air sh he accompanyingdrawings, ation partly in sec'- a cross section of the heatg doii'nii'aid. Fig, 3 is afeeding means.

' Iii the various figures A represents the t the. heating oven, which ed of any suitable refractory Fire brick. The bottom Wall ed with a central a pera mattie A2. which is itself ei'ing with the opening in his inutile A soniewl-ia-t e interior of the oven, so een the side, nd oven reL .F or tlie purpose of heating the mutiie, I

as Shown, tour burners B,

'which project tl These burnthe bottoni of the oven d with regard to the as to protecty the iame of' larly against the Walls L11 t: ses toward the be plaiin a inutili heated in not liable to develop iinnes and the radiation to 'the I thin the a thernionietter C, by which in the space. may be o ir heating the ported. by' pil-- work E in suoli' cient, roem for 'the le. i?, which is de.- e alesswaie and to be tiiieiity snp low sul? a.4 tai. e tia so aste torni the bottom itlie at. The 'table F is sup-Y aper end of a reciproca-ting ii'ougli the' ies shaft ll" guided in .iframe work E and counterbalanced by a weight F supported from a pulley F and connected with the `shaft F by bracket Ft. This counterpoise weight enables the operator to reciprocate the tables up and down with comparatively small effort.

For the purpose of reciprocating tl 1e table l provide a hand lever Gr fixed to a segmental. rack. G2, journaled at G and meshing with a pinion. Gl secured to a roel?. shaft Gt. From the rock shaft Gf* projects an arm G5 pivoted at its end to a link GG, which is connected with' the supporting shaft ll, in any convenient manner-proferably by being attached to the bracket F4. ll'vhen the lever G- is shifted to operate 'the rack and pinion, the arm G5 oscillasl to elevate or retract the linlt G and causo a correspondi ing advance or lonf'ering of the table ll. The ware to be subjected to the heat treatment is placed upon the reciprocating table and. the latter is lift-ed into place without the .ware coming in contact with any highly heated materials. The heating-of the ware, after it is/placed within the oven., takes place at approximately the same rate as the heating of the table and no unevenness in the heat treatment results. Alfter remaining within the oven for the proper length nl time the table is lowered by shifting the lever Gr andthe glass and table each allowed to cool until the former is in condition to be removed. lt will be seen that the arrangement described provides a simple means for removing the hot glassware from the mulllc without handling itA in any way vor allowing it to come in contact with any materials which by chance might be 'at a temperature lower than that of the ware itself. e

Throughout this operation it will be seen that the heated air within the inutile pocketed in such a .vay that it `virili have no tendency to flow therefrom and there will bc no material fluctuation noticeable in the temperature during the shortintcrval neces sarj.r to remove and renew the charges.

lt has been found in practice that tht above apparatus is effective in annealing 4and beat treating incandescent bulbs in a miiliorin manner, and permits of their being handled with a ininnnum percentage ol breakage. v

It will be obvious that certain' immaterial alterations may be inade in the structure without departing from the spiritof rn f invention or altering the character themed. loving described my invention, l claim:

anaal?? ing gases in the top of the oven, a vertically reciprocative table positioned below lthe opening in the bottoni of the mullle and provided with an overlapping flange adapted to seal the opening when the table is placed in elevated position, a supporting shaft for said table, a counterpoise attached to said shaft, and lever mechanism connected with said shalt for elevating and lowering the i table. y

2. A heating furnace comprising an'ovcn provided with an opening in the bottom thereof, a niullle within the oven and spaced apart therefrom and provided with an opening in its bottom in register with the opening in the bottoni of the oven, burners passing through the walls of' the oven so dise posed as to project their flames horizontally and angularly against the lower part of the side walls'of said Inutile, an exit for'the heating gases in the top of the oven, a. vertically reciproeative table positioned below the opening in the bottom of the inutile and provided with an overlapping flange adapted to seal the opening when the table is placed in elevated position, a supporting shaft for said table, a counterpoise attached to said shaft, and means for reciprocating the table 4consisting of a lever rigidly connected with a segmental rack, a pinion meshing with said rack and fixed on a y.rock shaft, an arm projecting from said rock shaft and connected by a pivoted link with the shaft supporting the table.

uln a heating furnace, a inutile within the furnace having imperf'orate side and top walls and a feeding opening in the bottoni thereof, and a vertically reciprocatory table adapted to receive the articles to be heated and to form a closure for the bottom of the maille.

lin testimony whereof, I hereunto allix my signature .in the presence of two witnesses.

J. M. STRONG, B. L. BROWN. 

